Can-body.



J. M: YOUNG.

CAN BODY.

APPLICATlON FILED 001.31, 1912.

1,157,278. 1 Patented Oct.19,1915.

Fi i.

4 HA W 5 WITNESSES lfilgN/VENTOR 3 ATTORNEY UNITED STATES PATENT oFFIoE.

JOHN M. YOUNG, SAN FRANCISCO, CALIFORNIA.

CAN-BODY.

Specification of Letters Patent.

Patented Oct. 19, 1915.

Application filed October 31, 1912. Serial No. 728,928.

food products, although it is designed more.

particularly for what is known as sanitary cans or those wherein the ends orcovers are double seamed onto a flanged end of the can body, and the invention resides in the construction of the end joint union between the ends of the longitudinal edge ofthe overlap or lap section of the can body with the ends of the longitudinal edge of the underlying section of the can body, the expression overlap or lap section, and the underlying section. of the can body being arbitrary terms employed for conveniently designating the relative locking sections of the side seam of the can body; the objects of theinvention being to provide against the extreme end joint connections of the longitudinal edge sections breaking, separating, or pulling apart when the soldered can-body is subjected to the action of the fianging rollers or devices for outwardly flaring or fianging the ends of the can body for the interlocking therewith of the can covers or ends, to reduce the thickness of the metal at the said extreme end joint connections, to provide for the formation of a better solder connection at such portions of the can body, to

materially increase the strength of the said I end or lap joint sections of the can body, to provide against leaks at the extreme end joint connections of the said body, and in general to materially improve the end joint union or connections of the lap portions at the ends of the side seam joint, and by so doing increasing the efliciency of the can body for the purposes desired.

Ordinarily, and more especially so where the union of the longitudinal edges of a can I body blank when put into cylindrical form is made by what is known as a part lock and lap joint, seam union, the extreme" end edges of the lap section of the can bodyis substantially co-extensive vwith the ends of the underlying section,'and the endedges of-the said sections fall in the same horizontal plane, with the result that when the closed and soldered lap portions of the can body are subjected to the action of the flanging mechanism for outwardly flaring the ends of the said can body, the lap sections of the side seam pulls away from the underlying section at the corner edges thereof and breaks the solder union at such points and causes a bulging of the metal, and this breaking of the joint connection at the end corners of the joint union of the si e seam and thebulging of the metal resulting therefrom not only seriously interferes with the proper double seaming of a can cover thereto, but ofttimes is the cause of a leak at such points of the; completed can.

I have found from practical experience that if-the extreme end corners of the end edges of the lap sections of the can body blank be cut away and removed for a distance slightly below the horizontal edge of the blank, that there will be provided a clearance space at the edge corners'of the side seam of the formed can body and the.

corner edges of the lap sections will terminate a short distance below the plane of the circumferential edge of the can body, forming end pockets which are filled with solder on the closed bodycbeing subjected to the ,action of the soldering mechanism, which solder is forced under the lap sections of the lap seam union and gives additional strength at such points of the side seam to resist or prevent the seam from-opening or breaking apart under the action of the mechanism for fianging the end of the can body anddouble seaming the covers thereto; also the corner edges of the ends of lap sections of the side seam being removed or lowered a slight distance below the plane of the circumferential edge of the can body there is removed the slight projection ordinarily formed by the outside lap at the ends of the side seam of the can body, and which is crushed or mashed by the action of the fianging mechanism to suchan extent as to distort and at times break the joint union at such points;

again, by reason of the corner cut outs at the end corners of the lap or outside lap section of the can body blank there is on the at such points to be outwardly turned during the flaring of the ends of the can body,

all of which reduces the strain on the ma chines for flanging the ends of the can body and double seaming the covers thereto.

Another advantage for the notch or cut out formed at the end corners of the lap or outside lap edge section of the can body blank is that, if the ends of the can body blank are not brought into perfect registry when formed into a can body in the can making machinery so that one end stands slightly higher than the other, still when the body is locked and soldered the ends of the outer portion or lap section of the body will not be above the ends of the inner portion. This is a material help in the flanging of the ends of a can body, inasmuch as a formed and soldered body with one end slightly higher than the other will. make imperfect flanging, causing the outer part of the body to buckle or turn upward, producing imperfect double seaming, usually rej and described for use 1n connection wlth a sulting in a leaky can.

To comprehend the invention reference should be had to the accompanying drawings, wherein Figure 1 is a plan view of the improved body blank. Fig. 2 is a perspective view of the can body formed therefrom. Fig. 3 is a similar view of the can body after having one of its ends flanged.

In the drawings, referring to Figs. 1, 2 and 3, thereof, the numeral 1 designates the metallic blank, 2 and 3 the locking edge portions of the blank, and 4 and 5 the end lap sections of the locking edge-portions. The end lap or outside lap sections 4 are formed with a cut out 6 to place the extreme end corners thereof a slight distance below the plane of the horizontal edge 6 of the blank,

so that when the blank is formed into a can body 7 there is produced a pocket 8 at the upper corner of each end of the side seam 9, the end or corner 10 of each lap end of the side seam 9 being situated at a point a slight distance below the plane of the circumferential edgelO of the ends of the can body. As thus placed, there is no edge corner at the ends of the side seam to be acted on by the flanging mechanism to be torn apart, separated or bulged outwardly by the strain placed onto the metal during the out-turning thereof, and. the pockets 8 formed bythe cut out 6 provide a space for the reception of solder which is forced into the lap seam sections when subjected to the action-of the soldering mechanism in a much better manher than heretofore and which serves as added strength at such points of-the sideseam of the can bodyand prevents the lap sections of the side seam from opening up under'the act of flanging the ends of the the end corners during'the flanging operation, which is an important feature in connection with the double seamed sanitary cans inasmuch as it reduces imperfect and leaky cans to a minimum.

While the invention has been illustrated combined locked and lap joint side seam, its useis not so limited or restricted, and it is to be understood that by the expression lap joint reference is had to the end portions of the side seam and this irrespective as to what form of joint union is made intermediate such portions of the side seam.

The essential feature of the invention and that desired to be'covered broadly resides in cutting away the edge corner of the outside lap of the ends of the side seam of the can body to place the same below the plane of the circumferential edge of the can body. Having thus described the invention what is claimed as new and desired to be protectedby Letters Patent is:-

, A can body having an overlapping side seam poig'tion composed of more than one thickness of'-metal, said overlapping seam portion b'eing'partly'c"ut away at the eX- tre'mity of'one'gof its ends to prevent the protrusion fg' the metal when the can body is flanged.

In testimony whereof I have s gned my, name to this specification in the "presence of two subscribing witnesses. JNO. M. YOUNG. Witnesses:

N. A. ACKER, D. B. RICHARDS. 

